feat(icons): added letters icon (#4779)

* Added icons/letters.svg

* Added icons/letters.json

* Updated icons/letters.json

icons/letters.json

@@ -0,0 +1,26 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "Representing letters, alphabets, or written characters",
+    "Indicating alphabetical sorting or organization",
+    "Representing language, literacy, or spelling",
+    "Representing text input fields or textual data"
+  ],
+  "tags": [
+    "abc",
+    "alphabet",
+    "alphabetical",
+    "text",
+    "characters",
+    "language",
+    "typography",
+    "literacy",
+    "spelling"
+  ],
+  "categories": [
+    "text"
+  ]
+}

icons/letters.svg

@@ -0,0 +1,16 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M15 8H9" />
+  <path d="M21 15.354a4 4 0 100 5.292" />
+  <path d="M3 18h4a2 2 0 010 4H3.5a.5.5 0 01-.5-.5v-7a.5.5 0 01.5-.5H6a2 2 0 010 4" />
+  <path d="m8 10 3.453-7.648a.6.6 0 011.094 0L16 10" />
+</svg>